nmap/targets.h

/***************************************************************************
 * targets.h -- Functions relating to "ping scanning" as well as           *
 * determining the exact IPs to hit based on CIDR and other input formats. * 
 *                                                                         *
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 ***************************************************************************/

/* $Id$ */

#ifndef TARGETS_H
#define TARGETS_H

#ifdef HAVE_CONFIG_H
#include "nmap_config.h"
#else
#ifdef WIN32
#include "nmap_winconfig.h"
#endif /* WIN32 */
#endif /* HAVE_CONFIG_H */

/* This contains pretty much everything we need ... */
#if HAVE_SYS_TIME_H
#include <sys/time.h>
#endif

#if HAVE_UNISTD_H
#include <unistd.h>
#endif

#ifdef HAVE_SYS_PARAM_H   
#include <sys/param.h> /* Defines MAXHOSTNAMELEN on BSD*/
#endif

#include "nmap.h"
#include "global_structures.h"
#include "TargetGroup.h"

class TargetGroup {
public:
  NetBlock *netblock;

  TargetGroup() {
    this->netblock = NULL;
  }

  ~TargetGroup() {
    if (this->netblock != NULL)
      delete this->netblock;
  }

  /* Initializes (or reinitializes) the object with a new expression,
     such as 192.168.0.0/16 , 10.1.0-5.1-254 , or
     fe80::202:e3ff:fe14:1102 .  The af parameter is AF_INET or
     AF_INET6 Returns 0 for success */
  int parse_expr(const char *target_expr, int af);
  /* Grab the next host from this expression (if any).  Returns 0 and
     fills in ss if successful.  ss must point to a pre-allocated
     sockaddr_storage structure */
  int get_next_host(struct sockaddr_storage *ss, size_t *sslen);
  /* Returns true iff the given address is the one that was resolved to create
     this target group; i.e., not one of the addresses derived from it with a
     netmask. */
  bool is_resolved_address(const struct sockaddr_storage *ss) const;
  /* Return a string of the name or address that was resolved for this group. */
  const char *get_resolved_name(void) const;
  /* Return the list of addresses that the name for this group resolved to, if
     it came from a name resolution. */
  const std::list<struct sockaddr_storage> &get_resolved_addrs(void) const;
  /* is the current expression a named host */
  int get_namedhost() const;
};

class HostGroupState {
public:
  /* The maximum number of entries we want to allow storing in defer_buffer. */
  static const unsigned int DEFER_LIMIT = 64;

  HostGroupState(int lookahead, int randomize, int argc, const char *argv[]);
  ~HostGroupState();
  Target **hostbatch;

  /* The defer_buffer is a place to store targets that have previously been
     returned but that can't be used right now. They wait in defer_buffer until
     HostGroupState::undefer is called, at which point they all move to the end
     of the undeferred list. HostGroupState::next_target always pulls from the
     undeferred list before returning anything new. */
  std::list<Target *> defer_buffer;
  std::list<Target *> undeferred;

  int argc;
  const char **argv;
  int max_batch_sz; /* The size of the hostbatch[] array */
  int current_batch_sz; /* The number of VALID members of hostbatch[] */
  int next_batch_no; /* The index of the next hostbatch[] member to be given
			back to the user */
  int randomize; /* Whether each batch should be "shuffled" prior to the ping
		    scan (they will also be out of order when given back one
		    at a time to the client program */
  TargetGroup current_group; /* For batch chunking -- targets in queue */

  /* Returns true iff the defer buffer is not yet full. */
  bool defer(Target *t);
  void undefer();
  const char *next_expression();
  Target *next_target();
};

/* Ports is the list of ports the user asked to be scanned (0 terminated),
   you can just pass NULL (it is only a stupid optimization that needs it) */
Target *nexthost(HostGroupState *hs,const addrset *exclude_group, 
                 struct scan_lists *ports, int pingtype);
int load_exclude_file(addrset *exclude_group, FILE *fp);
int load_exclude_string(addrset *exclude_group, const char *s);
/* a debugging routine to dump an exclude list to stdout. */
int dumpExclude(addrset *exclude_group);
/* Returns the last host obtained by nexthost.  It will be given again the next
   time you call nexthost(). */
void returnhost(HostGroupState *hs);

#endif /* TARGETS_H */